This information is no longer current. Please visit NGWA's Web site (www.ngwa.org) for up-to-date material.

Computer-Aided Cleanup for Risk-based Soil and Ground Water Evaluation

?????This workshop will teach you the principles of soil and ground water modeling and train you on how to apply this knowledge using SESOIL and AT123D, two computer models widely used by state and federal regulatory agencies including the Environmental Protection Agency (EPA). The workshop participants will be led through examples of how to estimate soil and ground water contaminant concentration levels using the SESOIL and AT123D models. These models are applicable to chemical spills, pesticide applications, leaking underground storage tanks, landfills, and other sources causing chemical contamination to soil and ground water.

Why You Should Attend This Workshop:

?????If you are responsible for evaluating the potential hazardous effects of contaminated soil areas for site remediation and have little data available to you, this workshop will show you how to use two computer models as screening-level tools. The models utilize fewer soil, chemical and meteorological values as input than most other similar models.

Upon completion of this workshop, you will know how to:

• use climate data for your site,
• select appropriate soil and chemical parameter values for your site,
• understand the assumptions and equations in the SESOIL soil model and AT123D analytical ground water model,
• determine a soil cleanup level, and
• use the SESOIL and AT123D models in a Windows environment,
• understand and interpret the model results,
• graph model results for reports and presentations,
• use model results in health risk assessment.

• Lecture 1: How to properly use transport and fate models
  ?????- Considerations for applying models
  ?????- Modeling protocol
  ?????- Sensitivity analysis and uncertainty
  ?????- Model assumptions and limitations
  ?????- Data needs/site characterization
  
• Lecture 2: Principles and concepts used in modeling transport and fate of chemicals in soil and ground water
  ?????- How water moves through soil and ground water
  ?????- Chemical movement through soil and ground water
  ?????- Chemical mass transfer
  ?????- Degradation processes
  
• Lecture 3: Sources of model parameter data used in soil and ground water modeling
  ?????- Site measurement
  ?????- Literature values
  ??????????- Soil
  ??????????- Climate
  ??????????- Chemical
  ?????- Estimation methods for chemical parameters
  
• Lecture 4: An overview of the SESOIL model
  ?????- The soil compartment
  ?????- SESOIL cycles
  ?????- Hydrologic cycle
  ?????- Hydrologic calibration
  ?????- Sediment washload cycle
  ?????- Pollutant fate cycle
  
• Computer Exercise #1: Setting up and running the SESOIL model
  ?????- Case example
  ??????????- Leaking underground storage tank
  ??????????- Building the climate data file
  ??????????- Building the soil data file
  ??????????- Creating the chemical data file
  ??????????- Creating the application file
  ??????????- Running the SESOIL model
  ??????????- Computer graphing of data results
  
• Lecture 5: Reviewing and understanding the SESOIL modeling results
  ?????- Checking the model input
  ?????- Review of the monthly hydrologic results
  ?????- Interpretation of chemical concentrations and mass distribution
  
• Lecture 7: Selecting analytical fate and transport ground water models
  ?????- When is it appropriate to use analytical ground water models?
  ?????- Analytical model assumptions and limitations
  ?????- Predicting the migration and maximum concentrations of a chemical
  ?????- Collecting the required field data for ground water modeling
  
• Calculation Exercise #1: Estimating pore water velocity and time of travel
  ?????- Calculating Darcy's velocity
  ?????- Calculating pore water velocity
  ?????- Calculating ground water gradient from water table maps
  
• Calculation Exercise #2: Calculating partitioning and retardation factors of the soil matrix
  ?????- Calculating partition coefficients of a chemical
  ?????- Calculating the retardation factor of a chemical
  
• Lecture 8: An overview of the AT123D ground water model
  ?????- Governing equations
  ?????- Data requirements
  ?????- Understanding the format of the output results
  ?????- Model limitations
  
• Lecture 9: Setting up AT123D for various release scenarios
  ?????- Point sources
  ?????- Line sources
  ?????- Area sources
  ?????- Instaneous release
  ?????- Continuous release
  
• Computer Exercise #2: Setting up and running the AT123D ground water model
  ?????- Review of the AT123D Windows interface
  ?????- Linking a SESOIL model run to AT123D
  ?????- Reviewing and understanding AT123D results
  ?????- Computer graphing of ground water modeling results
  
• Computer Exercise #3: Using model results for determining exposure concentrations for health risk assessment
  ?????- Evaluating exposure concentrations at receptor locations
  ?????- Comparing exposure concentrations to ground water standards
  ?????- Calculating health risk at the point of interest
  
• Computer Exercise #4: Determining a soil cleanup level from model results
  ?????- Determining dilution and attenuation factors for soil and ground water
  ?????- Back calculating soil cleanup levels
  

• Toxicologists
• Hydrogeologists
• Environmental engineers
• Geotechnical engineers
• Health risk professionals
• Industrial hygienists
• Regulatory and legal professionals
  (Participants should be familiar with the Microsoft Window 3.1 operating system.)

Course Location:
Red Lion Hotel, Jantzen Beach
909 N. Hayden Island Drive
Portland, OR 97217
Phone (503) 283-4466
Fax (503) 735-4847
Room rates: $99 single/ $109 double, guaranteed until January 10, 1997

Course Fees:
NGWA Member...$825
Nonmember...$975
Fees valid for the February 1997 offering only.

CEUs: 1.5 Continuing Education Units (CEUs).

Instructors:

?????Stephen J. Scott of Environmental Graphics Inc. is the course developer and instructor. He has more than 15 years of experience in the use of computer models for environmental applications. Scott was an environmental engineer with the Wisconsin Department of Natural Resources and a program director of continuing engineering education at the University of Wisconsin -- Milwaukee. He is co-author of The New SESOIL User's Guide.